package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Service

public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    @Transactional
    public void saveWithFlaver(DishDTO dto) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dto,dish);
        dishMapper.insert(dish);
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dto.getFlavors();
        if(flavors!=null&& !flavors.isEmpty()){
            flavors.forEach(dishFlavor -> {dishFlavor.setDishId(dishId);});
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dto
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(),dto.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dto);
        return new PageResult(page.getTotal(),page.getResult());
    }
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        for (Long id:ids){
            Dish dish=dishMapper.selectById(id);
            if(dish.getStatus()==StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        List<Long> setMealIdsByDishIds = setMealDishMapper.getSetMealIdsByDishIds(ids);
        if(setMealIdsByDishIds!=null&& !setMealIdsByDishIds.isEmpty()){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
            dishMapper.deleteById(ids);
            dishFlavorMapper.deleteByDishId(ids);
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO selectById(Long id) {
        Dish dish = dishMapper.selectById(id);
        List<DishFlavor> dishFlavorList=dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavorList);
        return dishVO;
    }

    /**
     * 修改菜品信息
     * @param dto
     */
    @Override
    @Transactional
    public void update(DishDTO dto) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dto,dish);
        dishMapper.update(dish);
        dishFlavorMapper.deleteByDishId(Collections.singletonList(dto.getId()));
        List<DishFlavor> flavors = dto.getFlavors();
        if(flavors!=null&& !flavors.isEmpty()){
            flavors.forEach(dishFlavor -> {dishFlavor.setDishId(dto.getId());});
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 根据分类id查询菜品
     * @param cid
     * @return
     */
    @Override
    public List<Dish> selectBycid(Long cid) {
        Dish dish = Dish.builder()
                .categoryId(cid)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.selectByCId(dish);
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
        if(status == StatusConstant.DISABLE){
            List<Long> dishIds = new ArrayList<>();
            dishIds.add(id);
            List<Long> setmealIds = setMealDishMapper.getSetMealIdsByDishIds(dishIds);
            if(setmealIds!=null&&!setmealIds.isEmpty()){
                for(Long setmealId:setmealIds){
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }
            }
        }
    }

}
